From bbed9b13b12a5bdcaad414e4e2ccd469001eb0e7 Mon Sep 17 00:00:00 2001
From: "Alex Lam S.L" <alexlamsl@gmail.com>
Date: Sat, 15 May 2021 15:34:14 +0100
Subject: fix corner case in `collapse_vars` (#4936)

fixes #4935
---
 lib/compress.js | 1 +
 1 file changed, 1 insertion(+)

(limited to 'lib')

diff --git a/lib/compress.js b/lib/compress.js
index 6010752d..02c034f6 100644
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -1982,6 +1982,7 @@ merge(Compressor.prototype, {
                             force_single = true;
                             continue;
                         }
+                        if (replaced == assign_pos) assign_used = true;
                         var def = lhs.definition();
                         abort = false;
                         hit_index = 0;
-- 
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